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Search Publications by: Steven W. Brown (Fed)

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Displaying 101 - 125 of 162

Stray Light and Ocean Color Remote Sensing

January 1, 2003
Author(s)
Steven W. Brown, Bettye C. Johnson, N Souaidia, R Barnes, D K. Clark
Instruments used to make radiometric measurements of the ocean are typically calibrated against incandescent sources with a spectral distribution that peaks in the near-infrared, while the radiant flux from the ocean peaks in the blue to green spectral

System-Level Calibration of a Transfer Radiometer Used to Validate EOS Radiance Scales

January 1, 2003
Author(s)
Bettye C. Johnson, Steven W. Brown, George P. Eppeldauer, Keith R. Lykke
A number of transfer radiometers have been developed by the National Institute of Standards and Technology (NIST) with the support and funding of the National Aeronautics and Space Administration's (NASA's) satellite sensor calibration programs. The

Development of a Tunable LED-Based Colorimetric Source

August 1, 2002
Author(s)
Steven W. Brown, C Santana, George P. Eppeldauer
A novel, spectrally tunable light-source utilizing light emitting diodes (LED's) for radiometric, photometric, and colorimetric applications is described. The tunable source can simulate standard sources and can be used as a transfer sources and can be

Webpage for Optical Technology Division: SIRCUS Facility

May 1, 2002
Author(s)
Sally Bruce, Steven W. Brown, Keith R. Lykke
Spectral irradiance and Radiance Calibrations with Uniform Sources (SIRCUS) is a reference calibration facility that transfers detector based spectral irradiance scales derived from the High Accuracy Cryogenic Radiometer, to broadband filtered detector

Stray Light Characterization for MOBY

February 1, 2002
Author(s)
Bettye C. Johnson, Steven W. Brown, Keith R. Lykke, M Feinholz, M Yarbrough, S Flora, D K. Clark
The Marine Optical Spectrograpli (MOS) system is used as a down-welling irradiance and up-welling in-water radiance profiler in two configurations: as the sensor for the Marine Optical Buoy (MOBY) and as a mobile, sliipboard-deployable sensor. Both systems

Overview of the Radiometric Calibration of MOBY

January 1, 2002
Author(s)
D K. Clark, M Feinholz, M Yarbrough, B. Carol Johnson, Steven W. Brown, Y S. Kim, R Barnes
The Marine Optical Buoy (MOBY) provides values of water-leaving radiance for the calibration and validation of satellite ocean color instruments. Located in clear, deep ocean waters near the Hawaiian Island of Lanai, MOBY measures the upwelling radiance

Radiometric Calibration of the Scripps Earth Polychromatic Imaging Camera

January 1, 2002
Author(s)
E A. Early, B C. Bush, Steven W. Brown, David W. Allen, Bettye C. Johnson
As part of the Triana mission, the Scripps Earth Polychromatic Imaging Camera (Scripps-EPIC) will view the full sunlit side of Earth from the Lagrange-1 point. The National Institute of Standards and Technology and the Scripps Institution of Oceanography

Photometry: Sensing Light Color

September 1, 2001
Author(s)
Yoshihiro Ohno, Steven W. Brown
This article first addresses the need and importance of photometry and colorimetry for many products in our daily life- light bulbs in homes and offices; TV sets, computer monitors, headlights of cars, traffic lights, etc. Then the concepts of photometry

Radiometric Characterization of Field Radiometers in Support of the 1997 Lunar Lake, Nevada, Experiment to Determine Surface Reflectance and Top-of-Atmosphere Radiance

September 1, 2001
Author(s)
Steven W. Brown, Bettye C. Johnson, Howard W. Yoon, James J. Butler, R Barnes, S F. Biggar, P R. Spyak, Kurtis J. Thome, E F. Zalewski, M Helmlinger, C J. Bruegge, S Schiller, G Fedosejevs, R Gauthier, S Tsuchida, S Machida
A continuing series of field campaigns to Lunar Lake, Nevada, has been established for the development of ground-truth measurement protocols and assessment of measurement uncertainties for the ground-based calibration of on-orbit satellite sensors. In June

NIST Colorimetric Calibration Facility for Displays - Part 2

June 1, 2001
Author(s)
F Manoocheri, Steven W. Brown, Yoshi Ohno
velopment of a calibration facility for spectroradiometric, colorimetric, and goniometric measurements of displays, display colorimeters, and spectroradiometers has been completed at the National Institute of Standards and Technology (NIST). An overview of